* {
  margin: 0;
  padding: 0;
  list-style: none;
}
#container {
  width: 350px;
  height: 590px;
  margin: 10px auto;
  background-color: aquamarine;
  padding: 15px 0;
  box-shadow: 0px 0px 2px 5px aqua;
}
#container h2 {
  color: purple;
  font-family: 楷体;
  line-height: 40px;
  text-align: center;
}
#container ul {
  width: 85%;
  height: 370px;
  display: block;
  margin: 0 auto;
  overflow-y: scroll;
  padding: 5px 10px;
  border: 3px solid #fff;
}
#container ul li {
  line-height: 40px;
  border-bottom: 1px solid #aaa;
  cursor: pointer;
  padding: 0 5px;
  font-family: "楷体";
  font-size: 20px;
  /* font-weight: bold; */
}
#container ul li.on,
#container ul li:hover {
  color: #fff;
  font-weight: bold;
  background-color: pink;
  border-radius: 5px;
  border: none;
}
#container .singWord {
  text-align: center;
  margin-top: 20px;
}
.progressLine {
  position: relative;
}
#container .progress {
  width: 70%;
  height: 8px;
  background-color: rgb(82, 82, 228);
  border-radius: 4px;
  margin: 20px auto 15px;
  position: relative;
  cursor: pointer;
}
#container .progressLine span {
  display: block;
  position: absolute;
  top: -6px;
}
#container .progressLine span.allTime {
  right: 5px;
}
#container .progressLine span.curTime {
  left: 5px;
  color: red;
}
#container .progress p {
  position: absolute;
  height: 8px;
  background-color: pink;
  border-radius: 2px;
  left: 0;
  top: 0;
  width: 0;
  max-height: 245px;
  cursor: pointer;
}
#container .controls {
  text-align: center;
}
#container .controls button {
  width: 40px;
  height: 40px;
  text-align: center;
  border-radius: 50%;
  outline: none;
  border: none;
  position: relative;
  top: -8px;
  cursor: pointer;
}
#container .controls button.btn {
  width: 50px;
  height: 50px;
  margin: 0 15px;
  top: -5px;
  background-image: url(img/plause.png);
  background-position: center center;
  background-size: 30px 30px;
  background-repeat: no-repeat;
}
#container .controls button.play {
  background-image: url(img/play.png);
  background-position: center center;
  background-size: 30px 30px;
  background-repeat: no-repeat;
}
#container .controls button.prev {
  background-image: url(img/prev.png);
  background-position: center center;
  background-size: 20px 20px;
  background-repeat: no-repeat;
}
#container .controls button.next {
  background-image: url(img/next.png);
  background-position: center center;
  background-size: 20px 20px;
  background-repeat: no-repeat;
}
#container .contrl .vol {
  width: 75px;
  margin-left: 20px;
  position: relative;
  float: left;
}
#container .contrl .vol em {
  display: block;
  width: 30px;
  height: 30px;
  background-image: url(img/vol.png);
  background-position: center center;
  background-size: 20px 20px;
  background-repeat: no-repeat;
  cursor: pointer;
  float: left;
}
#container .contrl .vol:hover em {
  background-color: aqua;
}
#container .contrl .vol em.on {
  background-image: url(img/vol_on.png);
}
#container .contrl .vol:hover a {
  display: block;
  background-color: aqua;
}
#container .contrl .vol a {
  display: none;
  position: absolute;
  left: 0;
  top: -100px;
  width: 30px;
  height: 100px;
  background-color: pink;
}
#container .contrl .vol a span {
  display: block;
  width: 10px;
  height: 100px;
  margin: 5px auto;
  border-radius: 5px;
  background-color: pink;
  position: relative;
  cursor: pointer;
}
#container .contrl .vol a span i {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 10px;
  height: 20%;
  background-color: yellow;
  border-radius: 4px;
}
#container .contrl .vol b {
  display: block;
  float: left;
  line-height: 30px;
}
#container .contrl .randomAll {
  float: left;
  width: 60px;
  height: 30px;
  padding-left: 25px;
  margin-left: 20px;
  line-height: 30px;
  font-size: 14px;
  background-image: url(img/all.png);
  background-position: left 8px;
  background-size: 20px 15px;
  background-repeat: no-repeat;
  cursor: pointer;
}
#container .contrl .randomAll.on {
  background-image: url(img/all_on.png);
  color: blue;
}
#container .contrl .loopSingle {
  float: left;
  width: 60px;
  height: 30px;
  padding-left: 20px;
  margin-left: 20px;
  line-height: 30px;
  font-size: 14px;
  background-image: url(img/single.png);
  background-position: left 5px;
  background-size: 20px 20px;
  background-repeat: no-repeat;
  cursor: pointer;
}
#container .contrl .loopSingle.on {
  background-image: url(img/single_on.png);
  color: blue;
}
